Shuttle-driving mechanism for narrow-fabric looms



May 20 1 924. 1,494,952

G. CROMPTQN, JR

SIiU FTEE DRIVING MECHANISM FOR NARROW FABRIC LOOMS Filed June 12, 1922 Patented May 20, 1924.

'GEORGE CROMPTON', JR., OF WORCESTER, "-MASSACHUS ETTS.

' SHUTTLE DRIVING MECHANISM FOR NARROW-Fannie Looms. T i

Application filed June 12, 192 2. Serial No. 567,720.

To all whom it may, concern:

. Be it known that I, GEORGE CRoMr-ToN, Jr., a citizen of the United States, resid ng .at'Worcester, in the county ofWorcester and State of- Massachusetts,- have, invented "a new and useful Improvement in Shuttle- Driving Mechanism for Narrow-Fabric Looms, of which the following is a specificaions 4'. .For the latter purpose is provided tion.

My invention relates to narrow fabric looms,- and more, particularly to the shuttle drive in the lay'or lathe thereof. In the class of looms to which I refer the shuttles are commonly driven by a rack-rod through v,

the medium of pinion gears in the shuttle blocks and a small rack in the lower groove of the shuttle, Thedrive described is a positive/drive. I propose to substitute therefor a frictional drive and at the same Y I I I position. On the backof each shuttle is proxtime to providestops in the blocks to properly-position the shuttles, In so doing eliminate the occurrence of broken teeth which almost always entails smashed shuttles', smashed-warp and a shutdown for repairs.

In the drawings: 7 i

Fig. 1 is a general representation ofmy mechanism, partly in elevation and partly i in section.

Fig. 2 is a section on'the line 2-:2 of Fig. s

Fig. 3 is an enlarged section of the tension mechanism.

F ig. 4s is a diagrammatic view of the positioning devices.

Fig. 5 is an enlarged back view of one.

shuttle. i

Fig. 6 is an enlarged view of part of a pinion wheel.

' In the drawings I show at 1 on the top of which isany suitable frictional surface, e. g, rubber, shown at 2. This drive 'rod isaccurately positionedin a vertical direction and is also madeto reciprocate -With the minimum of friction by means of the rollers 3i Above the drive rod and made to revolve by it are the 'pinion rollers 4. These rollers may be made of fibre or they may be'made of steel and fluted as shown (see Fig. 6).

' In the lower groove or sticking of the roove 16. Each blockf'haseither. ajlower ;-pin 17 or an upper" pin '18,jal ternate"blocks having lower pins and alternate blocks havijn pper pins assho'wn. Itwill now be evidentthat since the right and left? positions .of the grooves'al's o'alternate, that thefshutblocks and that there will "be a drive rod,

its "movement in either direction. .sirable 1n case the loom is to be run fast shuttles 5 If'provideanotherfrictional ma ,ter1al6, preferablythe' same as thatj'atf' 2. The top groove or sticking of the shuttles injthe 't op blocks 20,?as usual; butthere sm ad itlon'the tension rollers 7'." These purpose of "allowing rollers serve the dual the shuttles to ride smoothly and atthe same time to press them dow'n againstthepinthe. tension adjusting mechanism indicated generally by 8, which studholder'9, thecollar 10, the set screw 11, the spring 12, the bracket 13, and the nut 14.

In Fig. 4 is diagrammatically indicated howthe shuttles are prevented "from running ovenor getting out of alignment. I show in Fig.4 one representation of the shuttles in theirright hand position and one sentation of the shuttlesin their left hand ided the upper groove 15 andtheflower consists of the forked tleswill be stopped when'the'endtof the,"

the respective no interference of the pins and grooves at the 'wrong t ime or place Note particularly Fig. 4 showing groove reaches the pin in the two-end p'ositions of the'shuttles and the positionsoff the pins'l7 and '18.

Theshuttles are held in their race ways :by

means of the'lower blocks 19 and the top blocks 20, which are aflixed to the lathe 21 by the backs rail. I I i V I 'My, mechanism operates as follows: Any suitable shuttle motion is provided to drive the drive rod l in precisely the same manner in which the rack rod is driven; I have not shown this.;mechanism as it may be of any usual or desired kind and is not necessary to theunderstanding of my-invention. Similarly, the rod 1 is provided with stops of any suitable orusualkind (notshown) to limit It is de- 23. At'22 is shown the reed.

orto doheavy work'to, give the rod 1 a I V fable a vertical plane, but if .they are accurately positioned in the first place this is unnecessary; It is equally obvious that my 1 e e i Sense, 'mgset forth in guided in race I said lower block, andfa reciprocable drive tact with" the surface 6;

itsjreturn. If the sively, the set screwill should bei tightened. 'n ade going any Imech'anismj will gradually wear out, when the frictional surfaces can be replaced, thusjsaving'smashes and shutdowns.

top" rollers 7' adjustable with spring pressure that Ifcan make them fixed with respect 'to the top blocks 'Ffdouble-deck lathe,

"that alth'ough specific terms are employed,

block with itscperiphery projecting into said and then in the other.

in the races to propel i. In a loom, a lay, spaced blocks on said lay and arranged to form shuttle races, friction rollers located on said blocks so as to 'frictionally contact with the shuttles when in the races to propel the shuttles, means to adjust'the frictional contact of saidrollers against the shuttle, and a drive rod reciprocably mounted on the lay in position: to frictionally contact with said rollers to 1'0- tate the same first in one direction and then in the other. 5; In a loom, a lay, a block on said lay comprising spaced members to form a shuttle race, a friction roller' d'isposed on one of said members to frictionally contact with theshuttlewhen in the race, means to propel said frictional roller in either direction, and a second friction roller" disposed' on said other memberand arranged to press against said shuttle. a

' '6. In a loom, alay, a block on'said lay comprising spaced'members to form a shuttle race, a paircoffriction rollerscarried by one member to frictionally contact withthe shuttle when in the race, a second pair of friction rollers adjustably carried by. the other member to contact against'said shuttle when in the racefand means to propelo'iie: pairof said friction rollers; V 7 In a loom,"a'l'ay, a block on said lay arranged to form ashu-ttle race, a frictionroller disposed onsaid-block,meansto pressisaid "roller into frictional contact with the shuttle when infthe race, and. means torotate said friction'roller' in either direction to: propel said shuttle." i

SJIn aloom, a lay, a, block. on saidr lay V and arranged to form a shuttle race, afriction roller disposed on said block so as to frictionally contact withmthe shuttle when in the race,"'mea'ns to "adjust the contact pressure therebetween, and means to rotate said roller in'eithe'r direction. 9. In a loom, a lay, spaced blocks onsaid lay arrangedto form opposed shuttle'races, a shuttle, means to propel said shuttle from one recess into the other, and cooperative means on each block and on said shuttle for 1 positively"limiting' the movement of said shuttle into either race. propelling '10. In aloom, a lay, a series of spaced f blocks on said lay arranged to forni' pairs of opposed shuttlera'ces, a plurality of shuttles, each arranged to be propelled back and forth into the" races of each pair, means to propel said shuttles, a pinfon each bl'ock, a 7 pair of spaced apart grooves on each shuttle, said p'ins and grooves being constructed and: arranged to positively limit the movement of each shuttle in a race and irrespective of its'direction of propulsion. Y '11. In a loom',fa lay, a series of spaced blocks on said lay arranged to form pairs of opposed shuttle races, a plurality of shuttles, each constructed and arranged to be 1.0

movement about 1% to 2% in excess of the desired movement of the shuttles.

As the drive rod reciprocates it drives the pinion rollers 4: by frictional contact. These in turn drive the shuttlesby frictional con- The shuttles are by the pressure of kept against the pinions the spring 12, which is adjustible as described and which acts through the rollers 7. 'lhe shuttles arekept from moving beyond the desired distance by the pins and grooves above described, and in case a shuttle shouldslip a little on any pick, it would obviously be for'ced'into position again on shuttles should slip excesso to pieces all of a sudden,

It is obviousjtha't instead of making the n and can make the latter adjustable. "I can make the rollers 3 adjustinvention can be applied to the'so-called I wherein one set of bl'oeks andfshuttl'es isplaced above the other, each weaving a separate set of goods or pieces. f

Having thus given an illustrative imbodiment of'my invention, I wish it understood they are rtopbe taken in adescr iptive or thescope of my invention bethe following claims: a g i a' lay, a plurality of shuttles blocks on said lay, frictional meanstq drive the saidshuttles and stopping means to preventthe shuttles from overrunning'i'n the blocks. Y e "25'111 a loom, "a lay, a series of pairs of blocks spaced apart on the'lay,each of said pairs including spaced upper and "lower blocks forming a shuttle race therebetween, a friction roller mounted in each lower 1. In aloom,

for frictionally shuttle raceway beyond the lower face 0 the shuttle, and

rod frictionally contacting all of said rollers for rotating the same, first in one direction 3. In a loom, a lay,spaced blocks on said lay, and arranged to form shuttle races, friction rollersdisposed on said blocks so as to frictionally contact with the shuttles when the shuttles, and a drive rod reciprocably mounted on the lay in position to contact with said friction rollers to rotate the same 'firstin one direction and then in the other. i

said pins being arranged alternatively, upper and lower, on said blocks to correspond with the alternative arrangement of the up- 10 per and lower planes of the grooves in said shuttles.

GEORGE CROMPTON, JR. 

